The Philadelphia Eagles clinched the No. 1 overall seed in the NFC on Christmas night, but were reminded life in January will be much more difficult without Carson Wentz. In Monday night's last-minute win over the Oakland Raiders, Nick Foles showed why he's a backup. The quarterback completed 19-of-38 passes for 163 yards, one touchdown and one interception. Foles often held the ball too long, missed receivers high or in the dirt, and rarely hit targets in stride. The veteran backup was particularly woeful on third downs, where the Eagles went 1-14. "I didn't play good enough. I have to play cleaner and, obviously, play better," Foles said after the win. "Third down is a big thing with a quarterback; pin-point accuracy, making good decisions. I'll look at the film, I'll improve. These wins are tough; wins in the NFL are tough. This was a crazy, sloppy game. I thought our defense played wonderful -- giving us an opportunity -- I believe it was five turnovers. That's huge, that was big." Foles' four-touchdown performance in Week 15 belied the struggles the Eagles offense will encounter sans Wentz. Gone are the explosive plays and third-down magic. When the run game is stymied, as it was in the second half Monday night, the Eagles will struggle to move the ball. After squeaking out victories over two bad teams with Foles under center, the Eagles head into the playoffs with a bright red question mark at football's most important position.